/Engine/Source/Runtime/RenderCore/Public/ShaderStableKeyDebugInfoReader.h
Returns a string describing a PSO (shaders only). Because of shader deduplication there can be several multiple (thousands) possible options.
[FString](API\Runtime\Core\Containers\FString) GetPSOStableNameOptions ( const [FGraphicsPipelineStateInitializer](API\Runtime\RHI\FGraphicsPipelineStateInitialize-) & Initializer, int32 MaxOptionsToInclude )